Coal-cutting machine



A. STEVENSON AND A. LOGAN.

COAL CUTTING MACHINE.

APPLICATION FILED NOV. 13, 1919.

Patented Ndv. 16, 1920.

UNITED s r-Ares PAreurflorrice.f]

ALEXANDER s'rnvnns'oiv' AND ARTHUR LOGAN, 'o ene seow, soo'rtiiivn.

COAL-CUTTING MACHINE.

Specification of Letters Patent. Patented N 16, 1920 Application filedNovember 13, 1919. Serial No. 337,845.

may be regarded as a reconstruction of the machine ,known in the marketas the Sullivan machine, being designed to adapt that machine toconditions met with in certain collieries In the reconstruction of theSullivan machine a winch and wire rope have been substituted for thechain haulage of the Sullivan construction, provision being made forleading the rope directly to a point of anchorage or around a guide andthence in the reverse direction, whereby conveniently to effect thetravel ofthe machine in either direction. The speed-reducing trainbetween the motor and the barrel is simplified and provision i made foreffecting conveniently variation of the rate of feed. Thus, the speedreducing train of the present machine comprises simply a pair of spurgears, a pair of bevel gears, a crank and link and a pawl and ratchetmechanism associated with which latter is an adjustable mask.

In the accompanying drawings Figure 1 is a side elevation and Fig. 2aplan showing diagrammatically so muchof the machlne as is necessary forthe understanding, of the invention.

Referring to the drawings, 1 denotes the rotor spindle or driving shaftfast on which is the spur pinion 2 meshing with a s,pur wheel 3 on acounter-shaft 1 that carries at its free end a bevel gear 5 meshing witha bevel gear 6 on a vertical shaft 7 rotatable in bearing members 8, 8'.

Fast on the upper end of the shaft 7 is a. crank disk 9 to which isadjustably fitted a crank pin 10 connected by a link 11 to a rockingpawl-carrie 12 mounted on the dotted lines.

spindle 13 of the barrel or winding drum 14 and carrying a pawl 15engageable with a ratchet wheel 16 fixed to rotate with the said barrelor drum 14. A spring-pressed detent 17 serves to prevent reverserotation of the ratchet wheel 16 and therewith of the barrel so as toprevent unwinding of the rope 18 from the barrel.

As will be understood, step by step rotary feeding movements arecommunicated to the barrel from the roto spindle or driving shaft 1through the intermediary of the mechanism above described.

o vary the rate of feeding movement,

pel'lod of engagement of the ratchet wheel I.

16 by the pawl 15. v

When the plate 19 is turned to such a position as to silence the pawl15-, or lift it out of engagement with the ratchet wheel 16, a

lug or tongue 20 on the plate 19 acts on the.

detent pawl' 17' to disengage it from the ratchet wheel 16 so that thelatter will be freed. v

The plate 19'may be set in. any desired position of angular adjustmentby means of a nut 21 on a screw-threaded spindle" assing through aslotin said plate 19 and fitted into the post 22 on which the detentpawl 17 is pivoted. Th o t 22 passes through a curved slot in the plate19 which permits said plate to be adjusted to different workingpositions.

The rope 18 maybe led from the barrel or drum 14 in the direction shownin full lines or it may be led reversely around either of two guidepulleys 23 as represented in What we claim is:

A feeding mechanismfor a coal-cutting machine of the type referred to,comprising, incombination, a winding drum serving t receive a haulagerope, a driving shaft, speed-reducing train between said driving shaftand said drum, said train 1neluding a, pair of SpliI' gears, a air ofbevel names to this specifieation in the presence bf gears a crank andlink, a paw -carrier and two subscribing Witnesses.

pawl, a ratchet 'Wheel rotating with said drum, an adjustable shield"for the awl, whereby the working thro f the atter may be varied, andmeans for holdimg saaid shield in different workin ositions.

In testime y whereof we haVesignedpur- ALEX. STEVENSON. I ARTHUR LOGAN.Witnesses'i ISABEL R0LL0, A1 NE,L. WATT.

